Species Iris, Yellow Flag, Yellow Iris, Water Flag Iris
Irispseudacorus

Synonym:Iris acoriformis

Synonym:Iris acoroides

Synonym:Iris bastardii

Synonym:Iris flava

Synonym:Iris lutea

Height

Spacing
4-6 ft. (1.2-1.8 m)

Hardiness
36-48 in. (90-120 cm)

Sun Exposure
USDA Zone 4a: to -34.4 °C (-30 °F)
USDA Zone 4b: to -31.6 °C (-25 °F)
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)

Danger
Full Sun
Sun to Partial Shade

Bloom Color
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction

Foliage
Bright Yellow

Other details

Propagation Methods
Herbaceous
Smooth

Seed Collecting
May be a noxious weed or invasive

Soil pH requirements
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Patent Information

Class
Allow pods to dry on plant; break open to collect seeds

Bloom Time

Awards (if applicable)

Foliage Color

Bloom Characteristics
Ponds and Aquatics

Water Requirements

Where to Grow